a = 3;
b = 4;
c = a + b;
d = a + b + 5;
e = a + 6 + 7;
str1="abcdefge";
print("ab=\n");
str2="abcdefge";
print("ab=\n");
print(str1);
print("a="+a+"\n");
print("a="+a+",b="+b+",c="+c+"end\n");
if (e > 4)
{
   print("e>4\n");
   e = e + 1;
}
gtest = 10;
print("gtest="+gtest+"\n");
function gtestfunc() {
    global gtest;
    gtest = 20;
}
gtestfunc();
print("gtest等于"+gtest+"\n");
gtestfunc();
print("gtest1="+gtest+"\n");
#a={1,2,3};
